If ABCD is a quadrilateral in which AB || CD and AD = BC, prove that angleA = angleB.
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Given ABCD is a qudrilateral such that AB||DC and AD = BC. Construction Extend AB to E and draw a line CE parallel to AD. Proof Since, AD||CE and transversal AE cuts them at A and E, respectively. So, quadrilateral AECD is a parallelogram.
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Given ABCD is a qudrilateral such that AB||DC and AD = BC. Construction Extend AB to E and draw a line CE parallel to AD. Proof Since, AD||CE and transversal AE cuts them at A and E, respectively. So, quadrilateral AECD is a parallelogram.
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